Clamp anvil



FIG. 1 is a perspective view showing our new design;

FIG. 2 is a top elevation view showing our new design;

FIG. 3 is a front elevation view showing our new design;

FIG. 4 is right side elevation view showing our new design; and,

FIG. 5 is a bottom elevation view showing our new design. 

I claim the ornamental design for portions of a clamp anvil, as shown and described. 